/*
 * Copyright (c) 2003-2007, Bicom Systems Ltd.
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *   - Redistributions of source code must retain the above copyright notice,
 *	   this list of conditions and the following disclaimer.
 *   - Redistributions in binary form must reproduce the above copyright
 *	   notice, this list of conditions and the following disclaimer in the
 *	   documentation and/or other materials provided with the distribution.
 *   - Neither the name of the Bicom Systems Ltd nor the names of its
 *	   contributors may be used to endorse or promote products derived from this
 *	   software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 * 
 * Denis Komadaric,
 * Bicom Systems Ltd.
 */

#include "stdafx.h"
#include "Semaphore.h"

Semaphore::Semaphore(const TCHAR *name, int milliseconds, int initialCount, int maximumCount)
{
	Release = false;
	this->name = name;
	handle = CreateSemaphore(NULL, initialCount, maximumCount, name);
	if (handle!=NULL) {
		DWORD result = WaitForSingleObject(handle, milliseconds);
		if (result==WAIT_OBJECT_0) {
			Release = true;
		}
	}
}

Semaphore::~Semaphore(void)
{
	if (Release) {
		ReleaseObject(1);
	}
	if (handle) {
		CloseHandle(handle);        
	}
}


void Semaphore::Wait(int milliseconds) {
	WaitForSingleObject(handle, milliseconds);
}


void Semaphore::ReleaseObject(LONG lReleaseCount) {
	LONG lpPreviousCount;
	ReleaseSemaphore(handle, lReleaseCount, &lpPreviousCount);
	Release = false;
}
